Saudi Journal of Biomedical Research (SJBR)
Volume-3 | Issue-02 | 66-70
Original Research Article
Isolation, Identification and Antioxidant Properties of Anthocyanins Rich Fractions of Dacryodes edulis (African pear) Fruit peels
Uhunmwangho Samuel Esosa, Omoregie Sheena Ehimwenma
Published : April 17, 2018
Abstract
Anthocyanins content and antioxidant were determined in the three main
pigments toward ripening in Dacryodes edulis (African pear) fruit peels. The pigments
were extracted with acidified (0.5% HCl) methanol and the extracts were hydrolysed
and the applied on 3mm thin-layer chromatograms. The chromatograms were
developed subsequently in one direction, using n-Butanol: Acetic acid: Water (BAW)
(4:1:5 v/v). The anthocyanidin present in the three pigments, pelargonidin-3-
glycoside, was identified according to their Rf values, UV-vis spectrum and reaction
with NaOH. The results revealed that the concentration of anthocyanidin in the pink
(premature, week4-12) stage was 0.20 mg/g, white (maturing fruit, week 14-16) stage
0.32mg/g and blue-black (matured fruit, week 18-20) stage 0.56mg/g, this results
correspond to the capacity of the anthocyanidin to inhibits lipidperoxidation (TBAR)
with 76.9% (pink stage), 81.2% (white stage) and 90.0% (blue-black stage). The result
demonstrated a positive relationship between Anthocyanins (flavonoids) and
antioxidant activity. Hence, Dacryodes edulis is better consumed when fully matured.